Millions of years ago the area of Poland was covered by warm ocean waters, in which life developed. Sedimentary limestone rock from the Cretaceous and Tertiary becoming uncovered on the slopes of the Vistula valley remain from this period. The several score metres thick layer of sediments, seen as the high shore of the valley, is built from the remnants of sea organisms. On the meadows on the bottom of the former ocean artists create works that can are visible from the escarpment.